Motorola HF-SSB T1961A User Manual Download

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Summary of Contents for HF-SSB T1961A

Page 1: ...installation in structions and ground systems for the radio and the antenna tuner FAEPS 3000S 0 5381 Figure 1 AutomaticAntenna Tuner 2 PREINSTALLA TION INSTRUCTIONS 2 1 TUNE POWER ADJUSTMENT 7 CAUTION The following adjustments to the TRITON 20 or TRITON 12 and 24 chan nel radios must be performed before mak ing electrical connections to the antenna tuner 2 1 1 TRITON 20 Adjustment Step 1 In the TR...

Page 2: ...21 TD ROt Figure3 TRITON 20SchematicDiagramModijications TRITON 12 and 24 Channel Radio Modifications Refer to Table 2 and to Figures 4 thru 7 The TRITON 12 and 24 channel radio modifica tions consist of changes made on two separate circuit boards The first modification is done to the main cir cuit board by addition of components listed in Table 2 Figures 4 anCb S illustrate where these components...

Page 3: ...ode and resistor as illustrated in Figure 6 09 as P O TRN6227A TRN6429A TRN6430A 0 RIS R24 CR9 30011 0 r o CR4 Figure6 TRITON 12and24 ChannelSmall CircuitBoard Modifications PO DI 5A8LE1 9 11 024 0 PO _BlT T Q9 M9642 CRT BEPS OOIO O Figure 7 TRITON 12 and 24 Channel Small Circuit Board Schematic Diagram Modifications 3 INSTALLATION INSTRUCTIONS 3 1 GENERAL The procedure for a good installation is ...

Page 4: ...d one screw from the sur face that will be at the lowest position when the tuner is mounted 4 CAUTION Regardless of antenna tuner mounting position the selected drain hole must face downward ANTENNA TUNER 7 GAEPS 30013 0 DRAIN SCREWS Figure 9 Mounting Positions 3 4 GROUNDING A good ground system is required for efficient antenna tuner operation Use the ground lug on the antenna tuner for ground st...

Page 5: ...N 11 SOLDER LUG TO EACH CONTROL WIRE STEP 2 FEED CONTROL CABLE THROUGH HOLE IN MAIN BRACKET STEP S SLI DE HEAT SHRINKABLE TUBING OVER ASSEMBLY 11 SHRINK STEP 3 STRJP In OFF OUTER JACKET STRIP INSULATION BACK II ON EACH WIRE STEP ATTACH EACH CONTROL WI RIOTO CHOKE PIN ASSEMBLY THROUGH AN EYELET AND SOLDER EACH CONTROL WIRE WITH CHOKE PIN ASSEMBLY INTO ANTENNA TUNE Q CONNECTOR REFER TO FIGURE FOR CO...

Page 6: ...long in terms of the operating frequency wavelen 6th it can actually present a high impedance to the ground lug on the antenna tuner As a result the antenna tuner is electrically floating above the reference ground of the system 4 3 An adequate system ground is usually easily ob tained on a metal hulled ship with a metal deck All communications equipment can be grounded to the metal structure of t...

Page 7: ...UNER BULKHEAD FEED THRU INSULATOR METAL WATER TANK GROUND PLATE 7 GBEPS 30016 D 7 Figure 14 Ground System on Fiberglass Vessel l 1 4 WAVE RADIALS AT FREQUENCIES OF OPERATION LEAD IN WIRE GAEPS 30017 0 Figure 15 Radial Ground System 7 ...

Page 8: ...32049 29 841SOL02 14 82834H02 42 10283A20 14 844951 101 3 139102 J 15 QJ GAEPS 30104 Q PL 6953 O DESCRIPTlON LUG solder 3 used STRAIN RELIEF BRACKET side 2 used BRACKET main SCREW machine 4 40x 1 4 4 used LOCKWASHER Ij split 4 used TIE WRAP 2 used EYELET 3 used CHOKE RF 30 uH 3 used TUBING clear 1 4 3 used TERMINAL plug 3 used INSULATOR plug 15 pin CLIP cable INSULATOR SCREW tapping 8 18 x 1 2 Fig...

Page 9: ...igure 1 Automatic Antenna Tuner impedance source with a frequency range from 2 18 MHz Model T1961A includes the TRN4423A con nector kit for field assembly of the necessary control cables Model T1959A uses factory assembled accessory cables TKN8123A TKN8120A and TKN812IA Other wise the T1959A and TI961A are identical T1959A and TI961A Antenna Tuners are compatible with the 102 inch niobile whip ant...

Page 10: ... for several months a pre operational check on a service bench is recommended 3 2 The recommended set up for the pre operational check consists of all the components that comprise NOTE A TKN8119A Mobile Antenna Matching Harness must be used when checking a mobile whip antenna Figure 3 shows a recommended set up TUNER Figure 2 Typical Pre Operational Check Configuration EYELEl TUNER GROUND TERMINAL...

Page 11: ...operation by following the pro cedure given below Step 1 Set up the components of the radio installation as shown in Figure 2 Siep 2 Select Channell and turn the radio on During the initial 1 to 2 seconds the wattmeter should indicate a power level of approximately 3 watts The radio should then return to the receive mode CAUTION Step 3 should only be performed with an antenna simulator rated for f...

Page 12: ...cofarads 5 3 1 2 There are five steps of switchable input capacitance arranged in a binary order that is the value of a switchable capacitance is half the value of the next largest switchable capacitance The values of switchable input capacitance are 2000 1000 500 250 and 120 picofarads The values of switchable output capacitance for Models T1961A and T1959A are 400 200 100 50 and 27 picofarads Th...

Page 13: ... low to U8 33 to produce an 0 4 volt signal at the ANT TUNE line The radio is enabled in the tune mode and generates an on channel signal at approximately 3 watts If the VSWR is greater than 4 1 U6C applies a high to U8 39 and the microcomputer begins the 4 1 VSWR tuning sequence If the VSWR is less than or equal to 4 1 U6C applies a low to U8 39 and the tuner retains the tuning elements in the cu...

Page 14: ...r is reset and the initialization and 4 1 VSWR detection pro cess begins 6 5 4 9 Transition At Channel Change When a channel is changed using the channel selection knob on the radio a positive going pulse is ap plied to the CHANNEL CHANGE line BLU A low is applied to U8 34 and U8 39 to inhibit tuning until chan nel selection is complete One half second after channel selection is complete there is ...

Page 15: ...I L dA N O8 Ll OI 0 9980r SJ EI EI oN D1OJoJoJAl JJDl Q iJUpOOl S3JqnOJ L J3Un L DUU3JUY JpDUJOJny ii j j j w 1 I b i r a ti L t 11 O C c OIQ If I NI Lln 3Nn L I 3H i L ...

Page 16: ...D AND KI K5 ARE OPEN 3 INDIVIDUALLY CHECK EACH RELAY 8Y DISCONNECTING EITHER END OF L9 APf L YING 13 8 V TO THE SWITCHED A INPUT GRN GROUNDING THE APPROPRI ATE TEST POINT TO ACTIVATE RELAY TPI TPS TP17 TP28 4 RECONNECT AND SOLDER La RE MOVE GROUNO FROM TPII AND TPI2 TUNER DOES NOT INITIATE TUNING SEOUENCE WHEN RADIO CHANNEL IS CHANGED AND VSWR I DISCDNNECT PA DlSA8LE CHANNEL CHANGE CONNECTIO FROM ...

Page 17: ...WER VSWR 4 1 PERFORM VSWR DETECTO R TEST PROCEDURE PHASE DETECTOR TEST PROCEDURE 1 DISCONNECT ANTENNA FROM RF OUT TERMINAL 2 T196OA ANO T1962A MODELS ONLY CONNECT A 560 PF CAPACITOR FROM RF OUT TERMINAL TO GROUND 3 GROUND TP1 1 AND TP12 UNSOlDER AND REMOVE EITHER END OF R112 4 APPLY 3 WATT RF SIGNAL TO RF IN PUT TERMINAL 5 VARY FREOUENCY OF RF INPUT MEASURE VOLTAGE AT UB I VOL TAGE SOULD BE LOW WH...

Page 18: ... I I I I I l I I I j I j V KI2 NOTEII KI3 INOTEIII K OTE L29 J OMPONENT SIDE BOARD DETAIL RF OUTPUT NOTES I MOUNTE 0 ON SOLDER SIDE OF BOARD COMPONENTSIDE BO EEPS 302 4 0 SOLDER SIDE BO EEPS 3025 0 OL EEPS 302 ...

Page 19: ...SWITCHED A PA D SABLE CHANNEL CHANGE A NT TUNE NOT CONNECTED lard Detail and Ust and 3lJOO A I i RF N j I L r 1 U4 SHOWN FROM COMPONENT RF BOARD CIRCUIT BOARD ...

Page 20: ...BYCHANNEL SELECTOR SWITCH DURING CHANNEL CHANGE PULSE O32 S OFF 033 IS ON CI82 IS CHARGING 028 030 ARE TURNED ON APpL YING A LOGIC LOW TO U8 34 AND U 39TO NHIBIT THE START OF THE TUN ING SEOUENCE DURING CHANNEL CHANGE APpROX MA TEL Y 0 5 SEC AFTER THE FALLING EDGE OF THE CHANNEL CHANGE PULSE CI82 IS SUFFICIENTL Y DISCHARGED TO TURN OFF 028 030 RI20 10K s OV 3V ANT TUNE vIa 0 4 V DURING TUNiNG SEQU...

Page 21: ...O L4Z TO 019 AND alz CZ50 C50 Z2 PZI P2536 TO azo AND 013 C500 C 00 2 PZZ J O C SHUNT TO OZ I ANO alA CIOOO CZOO Z PZ TO aZ2 AND 0 5 CZOOO CAOO 5 P24 8 PZ7 37 PZ TO U8 5 AND azz VIA R8 R7 101 OUTPUT OF U6C IS 5 V UNTIL THE INPUT VSWR IS THE SAME AS THE VSWR THA T THE TUNER MICROPROCESSOR IS TUNING FOR 4 2 OR 5 1 AS DETERMINED SY U8 31 U8 32 WHEN THE APPROPRIA TE VSWR IS ACHIEVED ua 3IS 0 V J TUNE ...

Page 22: ... i32 ELEMENTS IN OUT 1 5 VS 12 11 SV 13 p 131 AlB 2 I V RSI 7K TPII lcs sv 1 05 M 1 J usr _C68 I oS 10 1 5 9 UlE 5 AND DE VICING J 0 V WHEN RADIO SELECTS AN A CHANNEL 5 V WHEN RADIO SELECTS A B CHANNEL i SEE SHEET 21 2 SEE SHEET 21 A LOGIC HIGH AT U8 36 TURNS ON usa WHICH IN TURN TURNS OFF USE AND 016 WHEN USE IS OFF 017 IS ON TO ENABLE 018 022 018 022 DRIVE RELAYS FOR OUTPUT CAPACITANCE A LOGIC L...

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